Siemens 7MH7300 Series, Руководство по эксплуатации

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5. Route the load cell cable to the junction box and connect the load cell according to the
supplied interwiring diagram.
Repeat steps for other load cells if necessary.
Note
Once the load cell has been replaced, check the weigh deck alignment with the approach
and retreat slider bars.
Alignment should be +1/32" (+0.8 mm) to 0" (0 mm).
Please consider the max. tightening torque of the fixing screws :
● 10 Nm for stainless steel loadcells
● 30 Nm for nickel plated loadcells
Both load cells should be within 1 mV of each other when compared, otherwise mechanical
interference is affecting the output signal. Check load cells to ensure they are level and
parallel to each other and the frame.
6. Perform a load cell balancing procedure as described in the integrator instruction manual.
7.9.3 Recalibration
1. Power up the integrator and using the appropriate integrator menu, verify that the new load
cell(s) are operating correctly.
2. Zero calibrate the unit using the integrator manual for reference. Record zero calibration
procedure results.
3. Span calibrate the unit using the integrator manual for reference. Record span calibration
procedure results.
4. Re-check zero calibration. Run another zero calibration and record the results. Verify that
the zero repeated to the same value recorded in step 2.
5. Confirm calibration with material test as described in the integrator manual, if possible,
before placing the weighfeeder back in operation.
Commissioning
7.9 Load cell replacement
SITRANS WW200
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Operating Instructions, 06/2018, A5E33560654-AC